**WHAT IS A SPECTROPHOTOMETER?
Spectrophotometer: Instrument used to measure the intensity of wavelengths in a spectrum of light compared with the intensity of light from a standard source. II Device for measuring the brightness of the various portions of spectra.
**WHAT IS SPECTROSCOPY?
Spectroscopy: In physics and physical chemistry, the study of spectra . The basis of spectroscopy is that each chemical element has its own characteristic spectrum.
***WHAT IS SPECTROPHOTOMETRY?
Branch of spectroscopy that deals with measurement of the radiant energy transmitted or reflected by a body as a function of the wavelength.
**WHAT IS SPECTRUM?